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Microchip Technology 25LC160C-I/MS
- Part No.:
- 25LC160C-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
25LC160C-I/MS.pdf
- Description:
- IC EEPROM 16KBIT SPI 10MHZ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:149
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Product details
Overview
25LC160C-I/MS from Microchip Technology Inc. is a 16 Kbit SPI Serial EEPROM with 2048 × 8-bit organization, 16-byte page write capability, and industrial temperature range (−40°C to +85°C). It operates from 2.5V to 5.5V, supports up to 10 MHz clock frequency, and features hardware write protection via WP pin and STATUS register control. It is used in embedded systems for nonvolatile parameter storage, calibration data retention, and firmware configuration.
For engineers reviewing the 25LC160C-I/MS datasheet, 25LC160C-I/MS pinout, 25LC160C-I/MS application, or 25LC160C-I/MS equivalent, key selection criteria include page size compatibility, VCC operating range, HOLD/CS timing margins, and block protection granularity for secure configuration storage in resource-constrained microcontroller interfaces.
Technical Context
The 25LC160C-I/MS implements a standard SPI Mode 0,0 (CPOL = 0, CPHA = 0) interface with separate SI and SO lines, requiring CS assertion, SCK synchronization, and optional HOLD suspension. Its internal architecture includes an 8-bit instruction register, page latches, and high-voltage generator for EEPROM programming.
Write operations require explicit WREN instruction followed by WRITE command and address/data; the write enable latch resets automatically after each successful write or power-up. Block protection is controlled via BP0/BP1 bits in the STATUS register, enabling selective write-protection of 0%, 25%, 50%, or 100% of the memory array.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8-bit), sufficient for storing boot parameters, device IDs, or sensor calibration coefficients in compact MCU systems. |
| Page Size | 16 bytes - limits contiguous writes to single-page boundaries; crossing pages wraps data instead of advancing, requiring software boundary checks. |
| Max Clock Frequency | 10 MHz at VCC ≥ 4.5V - enables fast read/write throughput compatible with mid-speed SPI peripherals without clock divider overhead. |
| Write Cycle Time | 5 ms max - defines minimum interval between write commands; impacts real-time logging latency and firmware update sequencing. |
| Endurance | > 1 million erase/write cycles - supports long-term field deployment in applications requiring frequent configuration updates (e.g., energy metering, industrial controllers). |
| Data Retention | > 200 years at +25°C - ensures reliable storage of critical settings across product lifetime without refresh mechanisms. |
| Supply Voltage Range | 2.5V to 5.5V - interoperable with both 3.3V and 5V logic domains, simplifying integration into mixed-voltage designs. |
Pinout & Package
25LC160C-I/MS is housed in an 8-lead MSOP (150 mil) package, measuring 3.0 mm × 3.0 mm × 1.1 mm, with exposed pad option not specified. Pin assignments are standardized across all 8-pin variants of the 25XX160 family.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select Input | Active-low enable signal; must be held low for entire SPI transaction; rising edge initiates internal write cycle after valid write sequence. |
| SO (Pin 2) | Serial Data Output | Tri-state output delivering memory contents on falling edge of SCK; enters high-impedance when CS is high or HOLD is asserted. |
| WP (Pin 3) | Hardware Write-Protect | Active-low pin that, when combined with WPEN bit set, disables writes to STATUS register nonvolatile bits - enables tamper-resistant configuration locking. |
| VSS (Pin 4) | Ground Reference | Primary return path for all I/O and core circuitry; requires low-impedance connection to minimize noise coupling during write cycles. |
| SI (Pin 5) | Serial Data Input | Accepts instructions, addresses, and data on rising edge of SCK; latched synchronously to avoid metastability in noisy environments. |
| SCK (Pin 6) | Serial Clock Input | Master-generated clock defining SPI timing; must remain low before asserting HOLD or releasing it to resume communication safely. |
| HOLD (Pin 7) | Communication Suspend | Pauses ongoing SPI transfer without resetting state; allows host MCU to service higher-priority interrupts while preserving transaction context. |
| VCC (Pin 8) | Supply Voltage | Power input for core logic and EEPROM programming circuitry; bypass capacitor (0.1 µF) required near pin for stable write operation. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed write cycles | Eliminates need for external write-complete polling delay; internal 5 ms timer ensures reliable programming independent of host timing constraints. |
| Block write protection | Four configurable protection levels (none, 1/4, 1/2, full array) allow granular security partitioning - e.g., lock bootloader region while permitting runtime parameter updates. |
| Built-in power-on write protection | Automatic reset of write enable latch at power-up prevents accidental writes during brown-out or reset sequences - critical for system reliability. |
| Hold function with zero-cycle resumption | Enables deterministic interrupt handling: suspend SPI transfer mid-sequence and resume exactly where left off, preserving byte alignment and address pointer state. |
| Industrial temperature rating | Guaranteed operation from −40°C to +85°C supports deployment in automotive ECUs, industrial PLCs, and outdoor IoT gateways without derating. |
Applications
| Industrial Sensor Calibration Storage | Embedded Firmware Configuration |
|---|---|
Use Scenario: Storing factory-calibrated gain/offset coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during system initialization via SPI; retains values across power cycles and temperature extremes. Use Value: Enables plug-and-play sensor replacement without manual recalibration; leverages 200-year data retention and >1M endurance for field maintenance intervals. | Use Scenario: Holding user-modifiable network settings (IP, subnet, gateway) in a Wi-Fi-enabled smart thermostat. IC Role / Device Role / Timing Role: SPI-connected parameter store updated infrequently but requiring guaranteed persistence and hardware-level write protection against firmware bugs. Use Value: WP pin + BP bits prevent accidental overwrite of critical connectivity data during OTA updates; 16-byte page size aligns efficiently with DHCP option encoding. |
| Medical Device Safety Parameters | Automotive Body Control Module Settings |
Use Scenario: Archiving safety-critical thresholds (e.g., temperature limits, alarm hysteresis) in portable diagnostic equipment subject to IEC 62304 compliance. IC Role / Device Role / Timing Role: Secure, tamper-evident configuration vault accessed only during authorized service mode; write-protection enforced at both hardware (WP) and register (BP0/BP1) levels. Use Value: Meets traceability and integrity requirements via dual-layer protection; ESD rating >4 kV ensures robustness in clinical environments with static-prone surfaces. | Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive body control units (BCUs). IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to 8-bit MCU; retains user preferences across ignition cycles and battery disconnects. Use Value: 5 µA standby current extends battery life during vehicle sleep mode; industrial temp grade covers under-hood ambient variations without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25AA160C-I/MS | Wider VCC range (1.8–5.5V); identical 16-byte page, pinout, and instruction set. | Better suited for battery-powered systems with brown-out conditions below 2.5V. | Select 25AA160C-I/MS if operating below 2.5V is required; otherwise 25LC160C-I/MS offers tighter VCC tolerance for 3.3V/5V-only designs. |
| AT25160B-MAU-10 | Same density and MSOP-8 package; supports 20 MHz clock (vs. 10 MHz); different STATUS register layout and protection scheme. | Higher-speed SPI may reduce configuration load time; requires firmware adaptation for status bit mapping and write-enable protocol. | Choose AT25160B-MAU-10 only when clock speed >10 MHz is needed and STATUS register compatibility can be verified in firmware. |
Compared with 25AA160C-I/MS and AT25160B-MAU-10, the 25LC160C-I/MS provides optimal balance of industrial-grade reliability, proven SPI interoperability with PIC® and other MCUs, and simplified protection configuration - making it preferred for cost-sensitive, temperature-stable embedded systems where 2.5V minimum supply is assured.
Availability
25LC160C-I/MS is available at Aetrix Electronics and suitable for industrial sensor nodes, medical diagnostics equipment, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 25LC160C-I/MS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 25LC160C-I/MS belongs to Microchip's serial EEPROM product line, engineered for reliable, low-power nonvolatile storage in space-constrained embedded systems where SPI interface simplicity and industrial temperature resilience are essential.
FAQ
What is the maximum clock frequency supported by the 25LC160C-I/MS?
The 25LC160C-I/MS supports a maximum clock frequency of 10 MHz when VCC is 4.5V to 5.5V. At lower supply voltages (2.5V ≤ VCC < 4.5V), the maximum clock drops to 5 MHz. This voltage-dependent timing ensures reliable setup/hold margins across its specified operating range and must be observed in MCU SPI peripheral configuration.
Does the 25LC160C-I/MS require external pull-up resistors on its SPI lines?
The 25LC160C-I/MS does not require external pull-ups on SI, SO, or SCK - these pins are actively driven. However, CS and WP should be pulled up externally (typically 4.7kΩ to VCC) to ensure defined logic-high states during power-up and idle periods, preventing unintended selection or write-protection activation.
How does page write operation work in the 25LC160C-I/MS?
The 25LC160C-I/MS has a 16-byte page buffer. A page write transfers up to 16 bytes starting from an address aligned to a 16-byte boundary (e.g., 0x0000, 0x0010). If the write crosses a page boundary, data wraps to the start of the same page - not the next - so software must enforce alignment or split writes manually to avoid corruption.
Can the 25LC160C-I/MS be used in automotive applications?
The 25LC160C-I/MS is rated for Industrial temperature (−40°C to +85°C), not Automotive (−40°C to +125°C). For under-hood or dashboard-mounted automotive use, Microchip's 25LC160D-I/MS or 25LC160D-E/MS variants - explicitly qualified to AEC-Q100 Grade 3 - are required instead.
What happens to the write enable latch after a power cycle of the 25LC160C-I/MS?
Upon power-up, the write enable latch in the 25LC160C-I/MS is automatically reset to disabled state. This built-in safety feature prevents accidental writes during power ramp-up or brown-out conditions, ensuring memory integrity unless an explicit WREN instruction is issued after stable VCC is achieved.
25LC160C-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 10 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
25LC160C-I/MS FAQ
1.How can I place an order for 25LC160C-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC160C-I/MS on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 25LC160C-I/MS reliable?
The price and inventory of 25LC160C-I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25LC160C-I/MS is usually 5 days.
3.What payment methods are accepted for 25LC160C-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC160C-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC160C-I/MS?
25LC160C-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC160C-I/MS order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 25LC160C-I/MS?
For technical support, including 25LC160C-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC160C-I/MS requirements.
6.How does Aetrix verify that 25LC160C-I/MS is sourced from the original manufacturer or authorized distributors?
All 25LC160C-I/MS products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 25LC160C-I/MS meets industry standards.
7.What is the process for return or replacement of 25LC160C-I/MS?
All 25LC160C-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 25LC160C-I/MS, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 25LC160C-I/MS part is unused and in its original packaging.
Return procedure for 25LC160C-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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